Abstract: A riser system for coupling a surface platform to a wellhead. The riser system includes a main tube, flanges and one or more tie rods. The main tube forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The tie rods are coupled to and extend between the flanges.

Abstract: A riser system for coupling a surface platform to a wellhead. The riser system includes a main tube, flanges and one or more tie rods. The main tube forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The tie rods are coupled to and extend between the flanges.

Abstract: Running tool apparatus for lifting heavy equipment such as diverters and other devices utilizing a drilling rig drawworks. The running tool has a slotted discs and pins mechanism to cause engaging dogs to engage and disengage the heavy equipment when rotational force is applied. A keeper assembly mounted at the top of the running tool keys into an impression at the top of the heavy equipment to secure the outer body of the running tool with respect to the heavy equipment. The inner body is sealed with respect to the outer body and the tool is shaped so that the heavy equipment can be pressure tested with the running tool engaged in the bore of the heavy equipment.